Question

find the missing angle

Explanation:

Step1: Use the property of adjacent angles on a straight line

Adjacent angles on a straight line sum to \(180^{\circ}\). So, \(y + 77^{\circ}=180^{\circ}\).

Step2: Solve for \(y\)

Subtract \(77^{\circ}\) from both sides of the equation: \(y = 180^{\circ}-77^{\circ}\).

$$y=103^{\circ}$$

Answer:

\(103\)